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公开(公告)号：US4742403A
公开(公告)日：1988-05-03
申请号：US911022
申请日：1986-09-23
申请人： Bonifacio Troletti
发明人： Bonifacio Troletti
CPC分类号： G11B20/10212 , G11B20/1419 , G11B20/1423
摘要： A digital data separator for use with apparatus for recovering binary information recorded in FM or MFM on magnetic media comprises a measuring unit which in correspondence with a read pulse n, supplies information representative of the actual duration of interval N between pulse n and the previous read pulse n-1. A media speed error recovery unit corrects such duration relative to the nominal speed according to a code representative of the media speed error, a peak-shift recovery unit which depending on the peak-shift of pulse n-1, determined on the basis of the temporal history of the most recent pulses n-3, n-2 and n-1 of such corrected duration, supplies duration information related to such interval and information representative of the direction and the entity of the peak-shift of the read out pulse n, and a speed error measuring unit defines a code representative of such error as the difference between the actual duration of a period consisting of a suitable number of subsequent intervals between read pulses and their nominal duration. This duration is corrected relative to the peak-shift of the pulses defining the beginning and the end of the period and is further "normalized" according to the nominal duration of the period. The speed error code is applied to the speed error recovery unit. The nominal duration of interval N is applied to a logic unit which generates a "window" signal and reconstructs the read pulse in a suitable phase relationship with the window signal.
摘要翻译： 用于恢复在磁介质上记录在FM或MFM中的二进制信息的装置的数字数据分离器包括与读取脉冲n相对应的测量单元，提供表示脉冲n与先前读取之间的间隔N的实际持续时间的信息 脉冲n-1。 介质速度误差恢复单元根据表示介质速度误差的代码来校正相对于标称速度的持续时间，峰值移位恢复单元取决于脉冲n-1的峰值偏移，该峰值移位恢复单元基于 提供这种校正持续时间的最新脉冲n-3，n-2和n-1的时间历史，提供与这种间隔有关的持续时间信息，以及表示读出脉冲n的峰值移位的方向和实体的信息 ，并且速度误差测量单元定义代表这样的误差的代码，即由读取脉冲之间的适当数量的后续间隔与其标称持续时间组成的周期的实际持续时间之间的差异。 该持续时间相对于限定周期的开始和结束的脉冲的峰值偏移被校正，并且根据周期的标称持续时间进一步“归一化”。 速度误差代码被应用于速度误差恢复单元。 间隔N的标称持续时间被施加到产生“窗口”信号的逻辑单元，并以与窗口信号适当的相位关系重建读取脉冲。
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公开(公告)号：US4672482A
公开(公告)日：1987-06-09
申请号：US659112
申请日：1984-10-09
申请人： Bonifacio Troletti
发明人： Bonifacio Troletti
CPC分类号： G11B20/10212 , G11B20/1419 , G11B20/1423
摘要： A digital apparatus recovers data recorded in FM or MFM on a magnetic media moving at a normal speed in which the reading of the media provides a sequence of timing/data pulses at variable intervals, which differ from a nominal interval due to speed error and magnetic "peak-shift". The apparatus provides identification of a nominal interval between read out pulses and the reconstruction of a correct stream of pulses properly located within a window signal. It includes a digital measurement unit which at each read out pulse n received in input supplies at an output a code indicative of the actual duration of the interval N between the pulse n and a previous pulse n-1; and a speed correction unit which corrects the measured duration of the interval N relative to speed error detected by the digital measurement unit during reading of a synchronization bit field. A peak shift correction unit included within the apparatus utilizing the corrected interval duration, and for MFM recording, the previous most recent history of received pulses establishes a nominal duration for the interval N. The nominal duration attributed to interval N is used by a regeneration unit to produce a suitable window signal and a regenerated pulse corresponding to the read out n pulse which is properly located within the window signal.
摘要翻译： 数字设备恢复在以正常速度移动的磁性介质上记录的FM或MFM中的数据，其中介质的读取以可变间隔提供定时/数据脉冲序列，其与由于速度误差和磁性的标称间隔不同 “高峰”。 该装置提供读出脉冲之间的标称间隔的识别以及正确位于窗口信号内的正确的脉冲流的重构。 它包括一个数字测量单元，每个读出脉冲在输入端输入一个代表脉冲n与先前脉冲n-1之间间隔N的实际持续时间的代码; 以及速度校正单元，其在读取同步位字段期间校正所测量的间隔N的持续时间相对于由数字测量单元检测到的速度误差。 包括在利用校正间隔持续时间的设备内的峰值偏移校正单元，并且对于MFM记录，接收脉冲的先前最近的历史建立间隔N的标称持续时间。归因于间隔N的标称持续时间由再生单元 以产生对应于正好位于窗口信号内的读出n个脉冲的合适的窗口信号和再生脉冲。
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公开(公告)号：US4664541A
公开(公告)日：1987-05-12
申请号：US624088
申请日：1984-06-25
申请人： Giannico Stefani
发明人： Giannico Stefani
CPC分类号： G06K15/10
摘要： A microprogrammed control apparatus for dot matrix serial printers and related printing method which allows increased horizontal resolution of the printing matrix and therefore the printing quality consistent with the restriction that no printing element can be actuated before a previous energization of any printing element has been completed. The increase of the horizontal resolution is obtained by using a character description matrix with high resolution and logic circuits responsive to binary configurations read out from such matrix. In a preferred alternative, the increase of the horizontal resolution is obtained by using a "compressed" character description matrix containing a plurality of printing patterns, one for each of the columns where printing has to be performed (hereinafter "column to be printed") and a corresponding plurality of codes, each related to a printing pattern and representative of the distance/time interval between the column to be printed and the previous column to be printed.
摘要翻译： 一种用于点阵式打印机和相关打印方法的微程序控制装置，其允许增加打印矩阵的水平分辨率，因此与在任何打印元件的先前通电之前没有打印元件可被致动的限制一致。 通过使用具有高分辨率的字符描述矩阵和响应于从该矩阵读出的二进制配置的逻辑电路来获得水平分辨率的增加。 在一个优选的替代方案中，通过使用包含多个打印图案的“压缩”字符描述矩阵来获得水平分辨率的增加，对于要进行打印的列中的每一列（以下称为“要打印的列”）， 以及相应的多个代码，每个代码与打印模式相关，并且代表要打印的列和要打印的先前列之间的距离/时间间隔。
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公开(公告)号：US4631667A
公开(公告)日：1986-12-23
申请号：US507854
申请日：1983-06-27
申请人： Ferruccio Zulian , Vittorio Zanchi
发明人： Ferruccio Zulian , Vittorio Zanchi
摘要： An asynchronous bus multiprocessor system where a plurality of microprogrammed processors communicate with a working memory through a common bus. Microinstructions are read out from working memory. At least one of the processors, in addition to conventional bus interface registers for latching of data, address and commands to be forwarded to the working memory through the bus, is provided with an additional interface register, devoted to the latching of a microinstruction address for a microinstruction to be read out from the working memory. The system is further provided with a multiplexer for selectively loading a microinstruction register either from a microprogram control memory or from the system common bus, via a direct path established between the system common bus and an input set of the multiplexer. The microinstruction transfer speed from working memory to the processor is further enhanced by means of different timing for the data transfer through the bus and the microinstruction transfer through the bus. In the case of data transfer a bus access cycle is started at the end of the processor cycle during which the relevant bus interface register is loaded. In the case of microinstruction read out from working memory, the additional interface register is loaded at the beginning of a processor cycle concurrently with the request of bus access cycle, so that the two overlap.
摘要翻译： 一种异步总线多处理器系统，其中多个微程序处理器通过公共总线与工作存储器通信。 微指令从工作记忆中读出。 除了用于锁存数据的常规总线接口寄存器，通过总线转发到工作存储器的地址和命令之外，至少一个处理器还具有附加的接口寄存器，专用于锁存微指令地址 从工作记忆中读出的微指令。 该系统还设置有多路复用器，用于经由建立在系统公共总线和多路复用器的输入集之间的直接路径从微程序控制存储器或从系统公共总线选择性地加载微指令寄存器。 通过对通过总线的数据传输和通过总线的微指令传输的不同时序，进一步增强了从工作存储器到处理器的微指令传送速度。 在数据传输的情况下，总线访问周期在加载相关总线接口寄存器的处理器周期结束时开始。 在从工作存储器读出微指令的情况下，附加接口寄存器在处理器周期开始时与总线访问周期的请求同时加载，使得两者重叠。
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公开(公告)号：US4607969A
公开(公告)日：1986-08-26
申请号：US666705
申请日：1984-10-31
申请人： Giancarlo Collina
发明人： Giancarlo Collina
CPC分类号： B41J11/54
摘要： A sheet front loading printer comprising a printer body with a chute beneath the body and having the inner portion bent upwards in order to guide a sheet inserted therein up to the platen. The platen also doubles as a sheet feeding device. To allow the use of sheets having a dimension less than the one defined by the path of the bottom of the chute, the chute is provided with at least one elongated opening or indentation and an arrangement of the printer supports which allows the printer to rest on a working plane. This permits further advancement of the sheet by manual action performed by the operator through the opening in the bottom of the chute.
摘要翻译： 一种纸张前装载打印机，包括在主体下方具有滑槽的打印机主体，并且具有向上弯曲的内部部分，以便将插入其中的纸张引导到压板。 压板也兼作送纸装置。 为了允许使用尺寸小于由滑槽底部的路径定义的尺寸的片材，滑槽设置有至少一个细长的开口或凹口以及打印机支撑件的布置，其允许打印机放置在 一架工作飞机 这允许通过操作者通过滑槽底部的开口进行的手动操作进一步推进片材。
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公开(公告)号：US4601593A
公开(公告)日：1986-07-22
申请号：US758860
申请日：1985-07-24
CPC分类号： B41J2/5056
摘要： A high quality printing method utilizing a matrix serial printer having a print head provided with needles arranged in a vertical column. The method comprises the steps of printing a print line in two print passes, and in advancing a platen, between the first and the second pass, by an amount equal to one and a half times the vertical pitch, center to center, between two contiguous needles.
摘要翻译： 利用具有布置在垂直列中的针的具有打印头的矩阵串行打印机的高质量打印方法。 该方法包括以下步骤：在两个打印遍中打印打印行，并且使第一和第二遍之间的压板前进一个等于垂直间距的一倍半 针。
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公开(公告)号：US4279033A
公开(公告)日：1981-07-14
申请号：US23050
申请日：1979-03-22
申请人： Romeo Brunelli , Angelo Casamatta
发明人： Romeo Brunelli , Angelo Casamatta
CPC分类号： H04L5/1415 , G06F13/18 , G06F13/4269
摘要： A circuit for coupling together for bidirectional information communication pairs of devices of a digital data processing system, wherein such communication is effected by interlocked information signals, and wherein there is provided a single lead for the bidirectional transfer of such interlocked signals.
摘要翻译： 一种用于耦合到数字数据处理系统的双向信息通信对设备的电路，其中这种通信由互锁信息信号实现，并且其中提供了用于双向传送这种互锁信号的单个引线。
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公开(公告)号：US4106108A
公开(公告)日：1978-08-08
申请号：US714177
申请日：1976-08-13
IPC分类号： G11C11/406 , G11C7/00
CPC分类号： G11C11/40603 , G11C11/406
摘要： A semiconductor memory is provided with means for refreshing the memory. Interrupt requests generated by the memory initiate refreshing cycles, which take place in parallel with normal read/write memory operations. The memory is divided in two parts or blocks. If the central processor unit assigns a cycle for read/write operation to one of the two blocks, the same cycle is utilized to recharge or refresh a row of storage elements of the integrated units which constitute the other block of the memory. Refreshing is regulated by low priority interrupt requests and, if not responded to, by high priority interrupt requests, which are mandatory.
摘要翻译： 半导体存储器具有用于刷新存储器的装置。 由存储器产生的中断请求发起与正常读/写存储器操作并行发生的刷新周期。 内存分为两部分或两部分。 如果中央处理器单元为两个块中的一个分配一个用于读/写操作的周期，则利用相同的周期对构成存储器的另一块的集成单元的一行存储元件进行再充电或刷新。 刷新由低优先级中断请求调节，如果没有响应，则由高优先级中断请求进行调整，这是强制性的。
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公开(公告)号：US4041473A
公开(公告)日：1977-08-09
申请号：US576523
申请日：1975-05-12
申请人： Angelo Bardotti , Renzo Pederzini
发明人： Angelo Bardotti , Renzo Pederzini
CPC分类号： G06F13/38
摘要： Apparatus for the flexible coupling of peripheral units to a digital computer system, wherein any input/output port of the system is capable of communicating with a peripheral unit over various forms of interface.
摘要翻译： 用于将外围单元灵活耦合到数字计算机系统的装置，其中系统的任何输入/输出端口能够通过各种形式的接口与外围单元通信。
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公开(公告)号：US4028612A
公开(公告)日：1977-06-07
申请号：US720151
申请日：1976-09-03
申请人： Luciano Orlando
发明人： Luciano Orlando
CPC分类号： H02M3/156
摘要： A dynamic current limiting circuit to be used in connection with voltage regulators of the switching type is provided. The current limiter consists of electronic means suitably connected into the power stage of a conventional switching voltage regulator, for the purpose of reducing or removing the detrimental peak current spikes which occur whenever the power transistor switches from the non-conducting to the conducting state.
摘要翻译： 提供了一种与开关型稳压器结合使用的动态限流电路。 电流限制器由适当地连接到常规开关电压调节器的功率级的电子装置组成，目的是减少或消除每当功率晶体管从非导通状态切换到导通状态时发生的有害峰值电流尖峰。
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